/Engine/Source/Developer/TextureCompressor/Public/TextureCompressorModule.h
Generates the base cubemap mip from a longitude-latitude 2D image.
static void GenerateBaseCubeMipFromLongitudeLatitude2D ( [FImage](API\Runtime\ImageCore\FImage) * OutMip, const [FImage](API\Runtime\ImageCore\FImage) & SrcImage, const uint32 MaxCubemapTextureResolution, uint8 SourceEncodingOverride )